[F500] 493 Rotax

[jryall at juno.com]

My understanding is that the motor, as installed in a sled, does have
that often quoted 10% more horsepower, but that is with flat slide carbs
that alone are worth about 7 hp, and they are also larger then the 38 mm
carbs now permitted.  Once the engine is running on the 38mm round slide
carbs, there is supposedly no hp advantage.  The comparison chart I have
shows the 494 has about 79 hp at 7500 rpm, and the 493 has the same at
8000 rpm.  The 493 shows more torque at low rpms (until 6000 rpm), then
again above 7600 rpm, but not a major gain.

John Ryall


On Mon, 11 Nov 2002 12:21:35 -0500 "Gebhardt, Robert (R.)"
<rgebhard at ford.com> writes:
> I agree. There aren't even exhaust pipes available for these things 
> yet. It
> sounds like this motor would phase in naturally. Although, I still 
> question
> whether it's really got that much more power.
> 
> Bob Gebhardt
> 

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